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Disulfide Bridges of Mucin Polymers
- Molecular classification
- Post-translational modification, Protein-protein interaction, Structural component
01
Overview
Disulfide bridges are covalent linkages between cysteine residues in mucin polymers that are critical for the assembly, stability, and function of mucus gels. They drive mucin dimerization and higher-order polymerization, forming a stable network essential for the viscoelastic properties and barrier function of mucus on epithelial surfaces. Defects in disulfide bridge formation can compromise mucus integrity and contribute to diseases such as COPD and cystic fibrosis.
- Other names
- Mucin disulfide bondsMucin cross-linkingMucin polymerizationMUC5AC disulfide bridgesMUC5B disulfide bridgesMUC2 disulfide bridges
02
Mechanism of action
Disrupting or modulating disulfide bond formation to alter mucus properties.
03
Biological functions
Mucus gel formationEpithelial barrier functionViscoelasticityHydration retentionPathogen trapping
04
Disease associations
Chronic Obstructive Pulmonary Disease (COPD)Cystic FibrosisInflammatory Bowel Disease (IBD)AsthmaOther Mucus-related disorders
05
Safety considerations
Potential disruption of normal mucus function.Off-target effects on other disulfide-bonded proteins.Immunogenicity of modifying agents.
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